Bonty Mud X (2.0) is the only one i can think of that is mud specific. Plenty of other 29er tyres are good allrounders though.
I have a set of the Mud X but have not tried them as yet as the weather has been good for once.

I'm using a Mud-X on the rear of my 29er and it's working out really good. I have an ACX on the front. May be a good combo for winter.

I've also used both tyres in their 26" form and been ultimately disappointed with their lack of durability (3 x ACX and a Mud X all succumbed to rocks too quickly) but my rigid SS 29er doesn't get the same amount of hammering as my woodsy HT so it should be okay.